[DisplayList] Create DrawDashedLine for paragraph code (#53411)

With this minor addition to the DlCanvas/DisplayList API the code in the paragraph builder no longer needs to worry about PathEffect objects and their varying support on the backends.

At this point all PathEffect code in the engine is obsolete and can be deleted, but I'll leave that for a follow-on PR.

The only PathEffect related thing I did delete was support for rendering primitives with a PathEffect in the DL Rendering tests, both because it is a vestigial attribute and also because it would interfere with the new DrawDashedLine rendering test (a PathEffect on top of a PathEffect...).
30 files changed
tree: 72265f0671fce129a3c7d6e7f9430bdcb94aa4bd
  1. .github/
  2. assets/
  3. benchmarking/
  4. bin/
  5. build/
  6. build_overrides/
  7. ci/
  8. common/
  9. display_list/
  10. docs/
  11. examples/
  12. flow/
  13. flutter_frontend_server/
  14. flutter_vma/
  15. fml/
  16. impeller/
  17. lib/
  18. runtime/
  19. shell/
  20. skia/
  21. sky/
  22. testing/
  23. third_party/
  24. tools/
  25. vulkan/
  26. wasm/
  27. web_sdk/
  28. .ci.yaml
  29. .clang-format
  30. .clang-tidy
  31. .clangd
  32. .engine-release.version
  33. .gitattributes
  34. .gitignore
  35. .pylintrc
  36. .style.yapf
  37. analysis_options.yaml
  38. AUTHORS
  39. BUILD.gn
  40. CODEOWNERS
  41. CONTRIBUTING.md
  42. DEPS
  43. Doxyfile
  44. LICENSE
  45. README.md
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